Jeremy Wade returns to the Okavango Delta to re-investigate a predatory carnivore that may have mauled over 100 victims of a capsized boat; to discover the truth, Jeremy offers himself up as live bait.

Jeremy Wade investigates rumors of a twenty-foot lake monster that attacks people; with snakes, freshwater sharks and giant sturgeon unlikely possibilities, the answer as to what it is drives Jeremy crazy.

Preparing a household for a new puppy; selecting the right puppy; basic biology of a dog.

Questions are answered about the French Bulldog, Poodle, Airedale, Chihuahua and Labrador.

A staff member heads to the Marine Mammal Center in California to help in rehabilitation efforts of elephant seals; African penguins Charlie and Lizzie have been together for 25 years, Charlie is having issues with his eyes; a piranha needs surgery.

The team welcomes two rescued southern sea otter pups Mara and Gibson, from the California coast; young ruddy ducks arrive at the aquarium and are introduced to their new habitat. Nandi, the aquarium's smallest manta ray, is due for a checkup.

Polka, a bottlenose dolphin, has a raspy voice and needs to see the doctor to get the all-clear; staff excitedly prepare for the upcoming puffin breeding season; two wobbegong sharks are due for a checkup; a curious box turtle goes for a walk.

Revisiting tanks Wayde and Brett have created for celebrities, including comic Tracy Morgan, actor Neil Patrick Harris and rock band Kiss.

Wayde and Brett create unique aquariums for a luxury apartment complex and a knee brace company; Wayde hopes to energize his employees by holding a special contest.

Wayde and Brett are challenged by a Southern California resort to build a tank inside the trunk of an oak tree; a Halloween store wants a coffin aquarium.

A rehabilitation facility wants a tank with a spine insert; medical practitioners desire an underwater forest fish tank for their office.

Dreams are coming to life in Oregon as Pete builds for Marlene, an 81-year-old woman who is finally getting one of her greatest wishes fulfilled: a treehouse; Marlene is giddy with excitement for this new adventure.

Pete answers the call of duty to build a tree house in Pennsylvania that focuses on the children of Marines; cargo netting off the deck provides an exciting way to enter, while even more nets inside form a bridge to access a private loft space.

Pete makes a treehouse touchdown in Pittsburgh for Antonio Brown, wide receiver for the Pittsburgh Steelers; his plan is to build a luxury skybox with a two-story window wall that overlooks a custom basketball court and football field.

Pete tackles the first climb-in movie theater; concessions are served to seating pods through a pulley system and loungers elevate into the trees to give perfect views of the big screen; a tree house for monkeys at the Los Angeles Zoo.

Pete partners up in Utopia, Texas, for his first joint venture: a tree house bed-and-breakfast built for romance; a French-inspired chapel of love has a 25-foot steeple and the biggest bathroom Pete has built to date.

Pete Nelson seeks out the most wonderful arboreal structures in the world, highlighting how each has been swayed by different artistic movements, while also appreciating function and form.

Pete's fun-loving friend is the lucky recipient of a treehouse built strictly for good times; the team builds a dream of a treehouse complete with a wine bar, a loft, and their first-ever hot tub in the woods of Western Washington.

Taking a look back at builds from the past is always a joy for Pete Nelson and the carpenters of NT&S; Pete and a few crew members gather around the campfire to poke fun at one another about the shenanigans they shared when building in the trees.

A friend of Pete's has the tree house bug and decides to open a tree house B&B; the classic A-Frame structure has all the amenities and a waterfall that pours from the wraparound deck to the pond below.

Pete Nelson seeks out the most wonderful arboreal structures in the world, highlighting how each has been swayed by different artistic movements, while also appreciating function and form.

Pete's fun-loving friend is the lucky recipient of a treehouse built strictly for good times; the team builds a dream of a treehouse complete with a wine bar, a loft, and their first-ever hot tub in the woods of Western Washington.

Taking a look back at builds from the past is always a joy for Pete Nelson and the carpenters of NT&S; Pete and a few crew members gather around the campfire to poke fun at one another about the shenanigans they shared when building in the trees.

A friend of Pete's has the tree house bug and decides to open a tree house B&B; the classic A-Frame structure has all the amenities and a waterfall that pours from the wraparound deck to the pond below.

Pete answers the call of duty to build a tree house in Pennsylvania that focuses on the children of Marines; cargo netting off the deck provides an exciting way to enter, while even more nets inside form a bridge to access a private loft space.

Pete makes a treehouse touchdown in Pittsburgh for Antonio Brown, wide receiver for the Pittsburgh Steelers; his plan is to build a luxury skybox with a two-story window wall that overlooks a custom basketball court and football field.

Lucas builds a family size water park in a neglected backyard that includes a waterslide and double-decker outdoor patio.

Lucas and his crew encounter several design firsts as they create a Mexican-inspired resort in a Venice, Fla. backyard.

Treating their dog's allergy plunges a young couple deep into debt; a hognose snake is reluctant to eat; early plans for a dog sanctuary are riding on a successful, well-attended auction.

A dog named Goobs wins the RAPS team's hearts; Shadow, a Pitbull mix, has a potentially cancerous lump on his neck; Lilou the cat gets a diagnosis to explain her aggressive and unusual behavior; Karen and her team of pickers hit a jewelry jackpot.

A mystery illness afflicting Ceelo the Doberman puppy has the entire RAPS vet team in detective mode; Cardamom, a Shar Pei puppy, demonstrates why cute can be complicated; the pickers uncover a royal treasure in one of the abandoned bins.

The slow loris has a tiny window for breeding, so staff anxiously help a potential pair connect; the veterinary team develop ground-breaking techniques to treat the stoic pigeons; an okapi with a limp gets a helping hand.

The squirrel monkeys play hard-to-get with the Children's Zoo's keepers; a pair of Komodo dragons meet for the first time, with explosive results; the Inca terns prepare for their first big flight.

The brown bears keep tearing up their exhibit, leaving zoo staff scrambling for a solution; Armani the aardvark gets treated for a tooth infection which has dampened her enthusiasm for digging; a group of burrowing owls prepare to move.

Trust and experience are put to the test when an elephant requires delicate veterinary treatment from her keepers; endangered pink pigeons need all the help they can get to produce offspring; Monty the adorable otter needs to visit the dentist.

The team travels to Romania to assist with a street dog problem; a deaf dog needs a complex surgery; a wounded European bison takes the team to the mountains.

When a young Boxer falls from a second-story window, the team races to the rescue; Dr. Jeff discovers a life-threatening problem in a Great Dane; after a beloved cat is attacked by a mystery animal at night, Dr. Don battles to save his leg.

Dr. Jeff fights to save a pit bull after a rattlesnake bites it; the team battles to save a cherished cat rescued from an apartment fire; Dr. Amy performs emergency surgery when a car hits a girl's beloved Chihuahua.

Dr. Jeff and his team head to Houston to rescue dogs in the aftermath of devastating floods; in Denver, Dr. Amy treats a cat with a mysterious wound; a young Lab needs emergency surgery after eating something unusual.

Dr. Jeff performs surgery on Slash, a dog who can't keep his food down and weighs 20 pounds less than he should; Winter the cat has a bloody wound on his side.

Dr. Jeff must perform a rare surgery to save a pup with a deadly illness; a young pregnant woman counts on Dr. Amy to help her badly injured cat; Dr. Jeff and the team head to a wildlife sanctuary to treat a pride of lions.

Dr. Jeff helps a remote town in Colorado overwhelmed by feral cats; a staff member's beloved dog needs emergency surgery; Dr. Baier gives some injured birds of prey a second chance; Jeff races to save the life of a family's precious Chihuahua.

A local radio station helps Dr. Dee find a forever home for a special needs dog; cattle turns hostile during castration; Dr. Dee examines a recently awakened black bear.

Dr. Dee takes care of her mother while dealing with her busy clinic; emergency surgery on a Yorkie puppy; puppies are rescued from remote villages in the hopes of finding them homes.

Dr. Jeff must perform a rare surgery to save a pup with a deadly illness; a young pregnant woman counts on Dr. Amy to help her badly injured cat; Dr. Jeff and the team head to a wildlife sanctuary to treat a pride of lions.

Dr. Jeff helps a remote town in Colorado overwhelmed by feral cats; a staff member's beloved dog needs emergency surgery; Dr. Baier gives some injured birds of prey a second chance; Jeff races to save the life of a family's precious Chihuahua.

A local radio station helps Dr. Dee find a forever home for a special needs dog; cattle turns hostile during castration; Dr. Dee examines a recently awakened black bear.

Dr. Dee takes care of her mother while dealing with her busy clinic; emergency surgery on a Yorkie puppy; puppies are rescued from remote villages in the hopes of finding them homes.

When a young Boxer falls from a second-story window, the team races to the rescue; Dr. Jeff discovers a life-threatening problem in a Great Dane; after a beloved cat is attacked by a mystery animal at night, Dr. Don battles to save his leg.

Dr. Jeff fights to save a pit bull after a rattlesnake bites it; the team battles to save a cherished cat rescued from an apartment fire; Dr. Amy performs emergency surgery when a car hits a girl's beloved Chihuahua.

It's a lifelong dream for a retiring military couple in Huntsville, Ala. to have a dream pool; Lucas designs a gigantic grotto, enclosed spa and the craziest waterfall he has ever built.

Couple requests a zen space to relax in their Parrish, Fla. home; the crew tries to keep their zen in check.

A new cadet almost gets run down; Warden Boone investigates an armed trespasser; a Mexican boat in U.S. waters gets investigated for illegal nets.

Game wardens patrol the Rio Grande in search of an unidentified body; Warden Powell investigates an unusual deer case; Wardens Boone and Ataya respond to a call about mountain lions being shot in a woman's backyard.

When the Texas game wardens encounter a sick bald eagle, it becomes a race against time to ensure its survival; while checking deer camps near the border of Mexico, a warden finds himself in a high-stakes foot pursuit.

Texas Game Warden Benny Richards is committed to conserving Texas wildlife; Game Warden Albert Flores enforces fishing laws; Game Warden Jennifer Provaznik schools anglers; Game Warden Jayme Deschaaf makes sure dove hunters follow the laws.

The game wardens' marine team searches a foreign cargo vessel in the Gulf of Mexico; a man gets suspected of poaching 15 deer out of season; the game wardens discover a large marijuana growing operation outside of Dallas.

On the Gulf, hundreds of sea turtles face death during a cold spell; a tip leads to a raid on a deer poacher in central Texas; wardens crack down on white-tailed deer hunters; in southwest Texas, mule deer season is in full swing.

Warden Tommy Johnson pays a surprise visit to the home of a known poacher; Warden Mike Boone relocates an alligator snapping turtle; Wardens Inman and Eddins get a poacher to confess; Warden Jennifer Provaznik educates fishermen.

Wardens investigate decapitated deer and a poached bull elk while battling a winter storm; they join forces in a high-speed pursuit of a decoy shooter and unmask a hunter's deception.

Region 4 wardens have their hands full when a string of deer cases is reported to the station; suspicions rise when wardens stop a truck full of Christmas trees at the beginning of November.

Wardens find that a group of litterbugs is guilty of even more violations, and the Sheriff's office has to be called in; Wardens catch over-the-limit anglers in the act.

When the openings of both the bighorn sheep and archery elk hunting seasons overlap, wardens catch illegal hunters in the act; off-roaders cause some serious land damage; on the 4th of July seemingly intoxicated boaters give wardens a difficult time.

Wardens are on high alert during Montana's opening day of hunting season; wardens are determined to track down a gray pickup truck responsible for an illegal deer kill.

A warden is skeptical when a bow hunter without a license claims he's only elk calling. Hunters find out the hard way because they're on private property, and when an endangered grizzly bear is shot, wardens come out in full force.

Stories aren't adding up when wardens go to check if a group has valid fishing licenses; Wardens confront anglers fishing in closed water and crack down on anglers during the limited paddlefish season.

A warden is skeptical when a bow hunter without a license claims he's only elk calling. Hunters find out the hard way because they're on private property, and when an endangered grizzly bear is shot, wardens come out in full force.

Stories aren't adding up when wardens go to check if a group has valid fishing licenses; Wardens confront anglers fishing in closed water and crack down on anglers during the limited paddlefish season.

Region 4 wardens have their hands full when a string of deer cases is reported to the station; suspicions rise when wardens stop a truck full of Christmas trees at the beginning of November.

Wardens find that a group of litterbugs is guilty of even more violations, and the Sheriff's office has to be called in; Wardens catch over-the-limit anglers in the act.

Hamsters; guinea pigs; geckos; rabbits; parrots and ferrets.

Pet pig; hedgehog; pygmy goat; capybara; mini donkey; skunk.

M2 leaps into action to save a dog roaming the cane fields before it runs afoul of harvest machinery; Tia and Earl help match veteran adopter Kim with a senior dog; Toney and Emily make every day count for hospice dog Chester.

As the new VRC location nears completion, Tia and the team prep to welcome the public for a volunteer day; an Ohio couple feels a powerful connection with deaf dog Ben; Mariah draws on her passion for motorcycles to honor her beloved pit bull Tater.

Earl returns from rehab, hoping to rebuild his life working with the dogs; a couple comes looking for a dog who can handle crowded streets of NYC; Lizzy rescues a dog after a confrontation with the owner who abandoned it.

When a dog that was adopted out mysteriously appears in a shelter in Mississippi, Tania and Earl head to the rescue; parolee Joe must separate two stray dogs fighting outside the shelter, leaving him shaken; hound dog adoption doesn't go as planned.

Tia attempts to rescue a stray, but her leg injury holds her back; new parolee Mike struggles to balance working and being a parent; a family comes to Villalobos hoping to adopt a dog for their daughter, but finding a good match proves a challenge.

After months of croc-wrangling training with Steve Irwin's best friend Wes, Robert, Steve's son, takes the final step in his journey to feed Graham, a huge crocodile at the zoo's famous Crocoseum.

Bindi and the keepers ready Sophie the Baby Giraffe for her first steps into her enclosure; Robert helps to hand-raise Melman the Kangaroo; Terri oversees a health check for Ravi the Red Panda.

The Irwins travel to South Africa, where Terri helps release a wild leopard; Bindi learns from the all-female anti-poaching squad, The Black Mambas; Robert attempts to photograph Africa's big five game animals.

The family prepares Croc One, Steve Irwin's research ship, for a mission to release an endangered sea turtle back to the wild; Scarlett the giraffe reunites with her grandmother; Grub the wild echidna is released from the Zoo's Wildlife Hospital.

Robert and Indah, a Komodo dragon, participate in an exciting research experiment; Terri tries to save a koala joey with a zero percent chance of survival; Bindi visits friends at childhood favorite spot Oregon Coast Aquarium.

As Bindi celebrates her 21st birthday, she gets a surprise proposal from her boyfriend, Chandler; things get dangerous as Robert wrangles gators in thick mud; Terri helps with the momentous birth of a baby white rhino.

Robert and Terri take to the skies to release three rescued sea turtles near the Great Barrier Reef. Bindi anxiously awaits the birth of the zoo's first tiger cub in years. Richie helps a baby wallaby in his struggle for survival.

Erik is plagued by mechanical issues; Doug and John battle to keep their plane on an icy runway; Ariel receives a surprise visit.

Ariel disappears from radio contact, putting emergency services on high alert; Erik battles to touch down on a narrow runway.

Jim makes a nearly impossible landing in Unk; Sarah battles strong headwinds while attempting to deliver fuel to a research station.

After 30 years of running Era Alaska, Jim Tweto considers a new path; Doug loses all avionics while flying over the North Slope.

Erik is plagued by mechanical issues; Doug and John battle to keep their plane on an icy runway; Ariel receives a surprise visit.

Ariel disappears from radio contact, putting emergency services on high alert; Erik battles to touch down on a narrow runway.

Jim makes a nearly impossible landing in Unk; Sarah battles strong headwinds while attempting to deliver fuel to a research station.

After 30 years of running Era Alaska, Jim Tweto considers a new path; Doug loses all avionics while flying over the North Slope.

The family prepares Croc One, Steve Irwin's research ship, for a mission to release an endangered sea turtle back to the wild; Scarlett the giraffe reunites with her grandmother; Grub the wild echidna is released from the Zoo's Wildlife Hospital.

Robert and Indah, a Komodo dragon, participate in an exciting research experiment; Terri tries to save a koala joey with a zero percent chance of survival; Bindi visits friends at childhood favorite spot Oregon Coast Aquarium.

A dog's eye view of the bond shared by people and their pets.

Traits of the Jack Russell, golden retriever, Pembroke corgi, vizsla and German shepherd.

With the help of local police, Lt. Boudreau and Officer Hannett remove campers that are illegally occupying state property; an 8-year-old boy is found riding solo on an ATV, and Officer Crouse helps two raccoon cubs found on the road.

Officer McDermott finds an abandoned truck, sparking a winding investigation; Officer Holmes and Sgt. Lucas rescue paddlers near a capsized canoe; Holmes responds to a moose accident, while Officer Frye consoles a bereft woman.

Sgt. Pushee leads a multi-agency rescue mission to find a missing kayaker; a specialist is called in to locate a pesky bear roaming a residential area; and a boy is caught riding without a helmet and operating his ATV illegally.

Game wardens investigate an illegal deer hunting case that becomes the largest deer poaching case in Texas history.

Game Warden Kegan Gould crosses paths with a rock collector and uncovers a devastating secret; a teen is caught on camera destroying protected bird nests, and an unruly crowd threatens public safety on Lake Sam Rayburn.

A routine patrol turns intense when Game Wardens Kyle Allison and Dustin Delgado discover an angler is wanted for serious crimes, then rush to the scene of a plane crash.

Retired game warden Benny Richards returns with a friendly challenge for game warden Randolph McGee; a gunshot leads to dubious activity on a night stakeout; wardens spring into action to save a wakeboarder who has a life-threatening injury.

Wildlife agents question a hunter with something to hide and notice damning evidence on his person; a group of youths shooting ducks from a moving boat is caught in the act; frightened hunters accuse a landowner of serial harassment.

When an elderly man goes missing in a vast wilderness area, wildlife agents race to find him before nightfall; a tip leads agents to a haul of undersized redfish and anglers who refuse to confess; bloody evidence ties a trespasser to an illegal deer.

When wildlife agents find an alligator with a fresh bullet wound to the head, nearby anglers are the prime suspects; an injured hunter must be evacuated by helicopter; agents use drones to track crabbers selling their catch across state lines.

When a child is thrown from a boat and badly injured, wildlife agents are first on the scene; a night hunter faces multiple felony charges when agents make a grave discovery, agents confront a jet ski rider who risks drowning and gets belligerent.

Suspicious shotgun blasts on Catahoula Lake lead wildlife agents on a high-speed chase; a trail of beer cans points to a pair of hunters with multiple violations; on the bayou, agents catch a lawbreaking crawfisherman.

The search is on for a missing boater who may have suffered a stroke on Corney Lake; wildlife agents deploy as a hurricane makes landfall, rescuing stranded survivors from the floodwaters and dispensing lifesaving supplies.

Wildlife agents interrogate a felon caught hunting with a firearm; witnesses report a hunter trying to bludgeon a swimming deer from his boat; a duck shot out of season leads agents to a slew of violations.

LDWF biologists undertake an explosive mission to help conserve Louisiana's wild turkeys; a suspicious deer skull points to a hunter flouting the law; more than 1,000 lbs of shrimp are at stake when a captain is caught in a major violation.

Wildlife agents join a manhunt for an armed fugitive on the bayou; a nervous young hunter reveals a serious violation; a night shrimping bust leads to a familiar and unrepentant culprit.

The search is on for a missing boater who may have suffered a stroke on Corney Lake; wildlife agents deploy as a hurricane makes landfall, rescuing stranded survivors from the floodwaters and dispensing lifesaving supplies.

Wildlife agents interrogate a felon caught hunting with a firearm; witnesses report a hunter trying to bludgeon a swimming deer from his boat; a duck shot out of season leads agents to a slew of violations.

LDWF biologists undertake an explosive mission to help conserve Louisiana's wild turkeys; a suspicious deer skull points to a hunter flouting the law; more than 1,000 lbs of shrimp are at stake when a captain is caught in a major violation.

Wildlife agents join a manhunt for an armed fugitive on the bayou; a nervous young hunter reveals a serious violation; a night shrimping bust leads to a familiar and unrepentant culprit.

When an elderly man goes missing in a vast wilderness area, wildlife agents race to find him before nightfall; a tip leads agents to a haul of undersized redfish and anglers who refuse to confess; bloody evidence ties a trespasser to an illegal deer.

When wildlife agents find an alligator with a fresh bullet wound to the head, nearby anglers are the prime suspects; an injured hunter must be evacuated by helicopter; agents use drones to track crabbers selling their catch across state lines.

Dog's eye view of the Newfoundland, bichon frisé, dachshund, beagle and boxer.

Doberman, westie, Irish setter, miniature pinscher, and whippet.

Dr. Lavigne must decide during surgery if a giant schnauzer can keep his ear; a poodle named Jay-Z with suspicious symptoms needs Dr. Blue's help; Dr. Ross removes tumors from a rat; the vets pose with pets for a calendar to help animals in Haiti.

Dr. Lavigne treats a French bulldog with a very vocal breathing problem that requires a special surgery, before joining Dr. Blue on a pet pig transport; Dr. Ross has an exam with Gurgi the guinea pig, who is coughing and sneezing.

Dr. Ross closely examines a duck with a lump in his throat; Dr. Lavigne uses x-ray film during surgery in a very unexpected way; Dr. Blue tries to uncover a guinea pig mystery at the clinic; Dr. Lavigne's wife joins a local roller derby team.

A mother and daughter are being torn apart by their cat Missy, who seems determined to kill their other cat Fluffy; a tortie named Candy beats up a 9-year-old because she isn't so sweet.

Jackson has a tall order in Delaware helping a veteran with PTSD whose therapy cat, Salem, stresses him out; the Cat Daddy deals with Bartholomew, a cat shredding the furniture and tearing up a marriage.

Jackson meets bully cat, Baby, who's holding all the female cats hostage, causing them to hide in the bathroom; Jackson comes to the aid of an interior designer's couch destroying cats, one of which is shedding pounds on a hunger strike.

Jackson deals with a mother-daughter duo whose lovable cats have pissing matches that are destroying not only their furniture but also their relationship; the Cat Daddy connects with Cat From Heaven, Ziggy, who has CPR skills.

Jackson needs to find a way to help a distressed cat named Dale whose uncontrollable peeing is driving a wedge between his guardians; it proves nearly impossible for Jackson to get a guilt-stricken guardian to stop feeding her diabetic cat Lasagna.

Jackson goes to New Jersey to help a single mom whose cat, Pickles, terrifies her kids; the Cat Daddy works with Lucifer, a cat whose devilish food obsession and constant pursuit to eat may cost him his life.

Jackson works with Sydney, a Bengal, who's welcoming his new stepmom and new pit bull brother into the family by spraying every piece of furniture in the house; an energetic cat, Stella, threatens to harm a toddler.

Two survivalists attempt to endure 21 days in Mexico's Devil's Canyon, a notorious hellscape where no one else has managed to make it past one week.

Rachel, a survivalist from "Naked and Afraid of Love," and Na'im, an outdoorsman from Colorado, take on 21 days in the rugged wilderness of Argentina, but freezing nighttime temperatures may push them to their limit.

A backpacker and experienced hunter attempt to survive 21 days in a swampy Argentine savanna teeming with mosquitoes and violent subtropical storms.

Four male survivalists who tapped in previous challenges seek redemption in South Africa; humbled by their past failures, they hope to survive 21 days and triumph as a tribe.

A backpacker and experienced hunter attempt to survive 21 days in a swampy Argentine savanna teeming with mosquitoes and violent subtropical storms.

Four male survivalists who tapped in previous challenges seek redemption in South Africa; humbled by their past failures, they hope to survive 21 days and triumph as a tribe.

Jackson goes to New Jersey to help a single mom whose cat, Pickles, terrifies her kids; the Cat Daddy works with Lucifer, a cat whose devilish food obsession and constant pursuit to eat may cost him his life.

Jackson works with Sydney, a Bengal, who's welcoming his new stepmom and new pit bull brother into the family by spraying every piece of furniture in the house; an energetic cat, Stella, threatens to harm a toddler.

Discovering the bloodhound, Yorkshire terrier, Great Dane, shih tzu and Rhodesian ridgeback breeds.

Discovering the English bulldog, wire fox terrier, collie, and cavalier King Charles spaniel breeds.

Nicole Moore's vacation in Cancun, Mexico, gets cut short when a shark attacks her close to shore; in Tennessee, a timber rattlesnake bites firefighter Kyle Watson while he hikes in the woods with his family.

Wayne Petteway is attacked by an alligator while checking crab pots with his brother in North Carolina; in Arizona, Peter Baca is camping with his girlfriend and baby son when he is awoken by something attacking him through the walls of the tent.

Jim Lane picks blueberries alone in the Blue Ridge Mountains until a timber rattlesnake attacks; teacher Rachael Lilienthal's swim in a Florida river becomes a struggle when an alligator bites down on her arm, pulls her underwater and doesn't let go.

Southern Florida is filled with dangerous examples of native wildlife, including rattlesnakes, cottonmouths and alligators.

A child is sent into a coma after being bitten by a poisonous coral snake; Lt. Cullen learns that his niece has been bitten by a water moccasin.

Lt. Lisa Wood nearly loses a leg to an alligator blocking a roadway; the Venom One team encounters three deadly snakes.

A rattlesnake takes a dip in a pool, while another hides out in a woman's car; Capt. Seifert encounters a blood python.

Jeremy investigates the bull shark.

Jeremy Wade searches for the Amazon's notorious flesh eaters; a man is swallowed whole by a fish.

After two men vanish from a remote lake in Malaysia, Jeremy sets out to find the possible culprit; a trail of evidence leads Jeremy into an ancient rainforest, where an old adversary lies in wait.

Wade takes on the biggest investigation of his career -- to unravel what happened to over 1,000 passengers of the RMS Laconia, torpedoed in the mid-Atlantic; he travels the globe, battling giant fish, massive sharks and a deep-sea monster.

On a volcanic island in the Pacific, terror grips a fishing community when something in the water leaves a trail of bloody victims in its wake; the only clues they have to the attacker's identity are the large puncture wounds it left behind.

Wade takes on the biggest investigation of his career -- to unravel what happened to over 1,000 passengers of the RMS Laconia, torpedoed in the mid-Atlantic; he travels the globe, battling giant fish, massive sharks and a deep-sea monster.

Wade travels to Germany, where he meets victims of a beast seen raising its snout above the surface of freshwaters in Europe for the past 700 years; discovering the Wels catfish, an aggressive predator of man-eating proportions.

Jeremy tracks down eyewitnesses and survivors of piranha attacks, uncovering the fear behind the man-eater.

In the deep South lives a fish reputed to have committed a series of violent attacks on humans, said to be as vicious as a shark and as big as a gator; extreme angler Jeremy Wade heads to Texas to reveal the truth about the alligator gar.

Wade takes on the biggest investigation of his career -- to unravel what happened to over 1,000 passengers of the RMS Laconia, torpedoed in the mid-Atlantic; he travels the globe, battling giant fish, massive sharks and a deep-sea monster.

Wade travels to Germany, where he meets victims of a beast seen raising its snout above the surface of freshwaters in Europe for the past 700 years; discovering the Wels catfish, an aggressive predator of man-eating proportions.

Jeremy tracks down eyewitnesses and survivors of piranha attacks, uncovering the fear behind the man-eater.

In the deep South lives a fish reputed to have committed a series of violent attacks on humans, said to be as vicious as a shark and as big as a gator; extreme angler Jeremy Wade heads to Texas to reveal the truth about the alligator gar.

Jeremy Wade searches for the Amazon's notorious flesh eaters; a man is swallowed whole by a fish.

After two men vanish from a remote lake in Malaysia, Jeremy sets out to find the possible culprit; a trail of evidence leads Jeremy into an ancient rainforest, where an old adversary lies in wait.

Meeting the Pug, Weimaraner, Maltese, Soft Coated Wheaten Terrier, and Akita.

American Shorthair, Savannah, Scottish Fold, Persian, Ragdoll and Sphynx breeds.

The staff becomes concerned when beloved African penguin Zola falls mysteriously ill; the aquarium witnesses the annual spawning of an endangered coral species; Maggie the false map turtle has a date with the dentist.

The staff becomes concerned when Jupiter, the rescued sea lion, is not himself; the Ocean Voyager exhibit awaits its new residents, black-blotched fantail stingray siblings Bacon and Tomato; Shelley the shy box turtle makes friends.

After eating all his tankmate's food, Tank the hungry sea turtle finds a space to eat in peace; two beluga whales are welcomed to their new home at the aquarium; Scarlett the lovable sea lion turns 2.

Brett and Wayde share never before seen footage as they look back on some of the most unconventional tanks they have created.

Client wants a playable 8-piece drum set tank; tank for Hawaiian Lahaina Grill.

Wayde sends the team to team building boot camp to keep them motivated in building two huge salt water tanks.

Never before scene footage of some of the most outrageous tanks ever made.

Pete heads to Alabama's Appalachia to build a super spy treehouse; he pulls out all the stops to make the client's espionage-themed dreams come true; gadgets, hidden passageways, secret rooms and more.

Pete builds a citadel fortress for a Texan couple who loves all things medieval; a 25-foot-high tower holds a round table and thrones, as well as a glass floor loft; a metalsmith joins the build to craft medieval touches.

Pete travels through France with tree house visionary Alain Laurens; winding through the magical countryside, Alain shows Pete his structures that implement ingenious engineering, reach dizzying heights, and redefine what a tree house can be.

A dog-loving couple dream of a tree house that recaptures mountain vistas; Pete and his team build a bulldog bungalow that offers a bounty of outdoor decks and loads of large windows to take in a view once lost.

The NTS crew travels to an alpaca farm to build a lodge in the trees inspired by national parks; they create a structure to take in the mountain views with a 50-foot-long cable bridge entrance and a deck devoted entirely to hammock lounging.

Pete journeys to Kauai to build a sky-wave tree house for a couple who ditched the mainland for a laid-back lifestyle; he transforms a bohemian tree house for two former professional surfers into a masterpiece with a crow's nest 60 feet above ground.

Pete builds an all-star speakeasy for basketball legend Shaquille O'Neal; the ball is in Pete's court to design a decagonal structure with a soaring 25 ft. high ceiling and extra wide stairs to accommodate Shaq and his size 22 shoes.

Pete creates an off-the-grid escape that's all about peace, love, and treehouses, man; building a stunning treehouse made from re-purposed materials, while the client, Sarah Jay, adds her own touch - a massive dream net hammock in the trees.

Pete journeys to Kauai to build a sky-wave tree house for a couple who ditched the mainland for a laid-back lifestyle; he transforms a bohemian tree house for two former professional surfers into a masterpiece with a crow's nest 60 feet above ground.

Pete builds an all-star speakeasy for basketball legend Shaquille O'Neal; the ball is in Pete's court to design a decagonal structure with a soaring 25 ft. high ceiling and extra wide stairs to accommodate Shaq and his size 22 shoes.

Pete creates an off-the-grid escape that's all about peace, love, and treehouses, man; building a stunning treehouse made from re-purposed materials, while the client, Sarah Jay, adds her own touch - a massive dream net hammock in the trees.

Pete builds a citadel fortress for a Texan couple who loves all things medieval; a 25-foot-high tower holds a round table and thrones, as well as a glass floor loft; a metalsmith joins the build to craft medieval touches.

Pete travels through France with tree house visionary Alain Laurens; winding through the magical countryside, Alain shows Pete his structures that implement ingenious engineering, reach dizzying heights, and redefine what a tree house can be.

Lucas stretches beyond his realm of knowledge and enlists the help of Emperor Caesar himself to build a Roman palace-themed pool on the Gulf of Mexico.

Lucas attempts to make a 5-star hotel-style pool with a hidden entertainment zone out of a small, suburban backyard.

Dexter the dog has serious breathing problems; the team of pickers counting on abandoned storage locker goods gets an unfortunate surprise; Halo the chihuahua discovers more than exercise in the local dog park.

Dino the dog's anxiety level has the owner sacrificing her own mental health treatments; another dog, Dexter, is becoming increasingly nippy and confused; the final push at Bin City needs to reap big rewards.

A stray dog arrives at RAPS in rough shape and the team uncovers his surprising story; William, a street-wise cat, amazes Dr. Maldonado with his resilience; Odin, a German Eurasier, heads into surgery; Karen is handed a huge picking challenge.

Andean bear Bouba returns from the National Zoo in Washington, D.C., to reunite with his mate, Nicole; a king cobra is treated; Blanche, a feisty alpaca, is due to give birth at any moment.

When keepers introduce two tigers as potential mates, the process proves bumpy; a pair of African porcupines arrive at the zoo, requiring delicate handling; a pregnancy check on a 3,000-pound rhino necessitates some highly specialized equipment.

Surgery on a silverback gorilla's broken canine reveals a more serious medical issue; love develops between two birds-of-paradise; dozens of venomous tarantulas keep the staff on their toes.

A pregnant African wild dog has the staff anxiously preparing for the big day; zoo director Jim Breheny steps in to help a keeper learn how to handle a golden eagle; a new tree in Jungle World gives the gibbons a fresh world to explore.

Jeff and his team head to a remote town where they encounter an animal they never expected to see in Colorado; in Denver, a dog is rushed into the clinic after jumping out of a moving truck; Dr. Amy treats a kitten with a mysterious injury.

Dr. Jeff races to save a brave pit bull shot defending her owner during a robbery; Dr. Baier treats a guinea pig with an unusual problem; Dr. Jeff and Hector head out to a wildlife sanctuary that needs their help with a couple of wolves.

In Denver, the vets treat a cat named Byron who has been mysteriously losing weight; Bear the dog is treated for injuries after being hit by a car.

When a puppy is kicked in the head by a donkey, Dr. Jeff is her only hope; Jeff goes fishing for a hook stuck in a hungry beagle's throat; Dr. Amy helps a cat unable to walk; Dr. Nichols gets caught up in a wrestling match with an alpaca.

Dr. Baier races to save a young couple's cat after it is hit by a truck; Dr. Don operates on a basset hound with an unusual appetite; Dr. Jeff and his team head to Mexico to provide desperately needed vet care to the community.

When Dr. Jeff examines a beloved Weimaraner who has stopped eating, he makes a surprising discovery; Dr. Baier investigates the cause of a pet rabbit's mysterious fur loss; a servicewoman asks Dr. Jeff for help with her Pit Bull's injured leg.

A girl hopes Dr. Jeff can save her puppy from a deadly virus; a stray cat with a life-threatening injury; Dr. Jeff must gain the trust of rescued wolves to help an ailing member of the pack.

Dr. Dee and her team must use a helicopter to rescue a wounded horse deep in the woods; Husky mix is hit by a semi truck; investigating a bearded dragon's long slumber.

Dr. Dee takes her dog to a specialist in Anchorage; Dr. Dee reconnects with her step-daughter and checks on a barrel racing horse.

When Dr. Jeff examines a beloved Weimaraner who has stopped eating, he makes a surprising discovery; Dr. Baier investigates the cause of a pet rabbit's mysterious fur loss; a servicewoman asks Dr. Jeff for help with her Pit Bull's injured leg.

A girl hopes Dr. Jeff can save her puppy from a deadly virus; a stray cat with a life-threatening injury; Dr. Jeff must gain the trust of rescued wolves to help an ailing member of the pack.

Dr. Dee and her team must use a helicopter to rescue a wounded horse deep in the woods; Husky mix is hit by a semi truck; investigating a bearded dragon's long slumber.

Dr. Dee takes her dog to a specialist in Anchorage; Dr. Dee reconnects with her step-daughter and checks on a barrel racing horse.

Dr. Jeff races to save a brave pit bull shot defending her owner during a robbery; Dr. Baier treats a guinea pig with an unusual problem; Dr. Jeff and Hector head out to a wildlife sanctuary that needs their help with a couple of wolves.

In Denver, the vets treat a cat named Byron who has been mysteriously losing weight; Bear the dog is treated for injuries after being hit by a car.

Lucas Congdon is tasked with creating a bird pond oasis and a human pool within an outdated, unkept backyard in the middle of a designated bird sanctuary for a very eco-friendly oriented family in Osprey, Fla.

Lucas goes above and beyond as he creates a private lazy river that surrounds a real island with huge waterfalls; he also adds a grotto that boasts a state of the art media system and outdoor kitchen.

An inmate prepares for a reunion with the son he hasn't seen in a decade; teams are put on alert when narcotics infiltrate the penitentiary.

Young convict Redneck prepares for his first rodeo ride, while an unruly inmate may not get his shot at glory; a suicide is reported in the dangerous punishment unit known as Camp J.

A new inmate to Angola finally meets his grandfather, a prisoner also serving a life sentence; Lt. Col. Slater reconnects with a dying inmate.

The convicts prepare for the final rodeo of the season; inmate James learns that he has been granted early release from Angola.

A hunter who mistakenly takes down an antlered elk must face the consequences; a warden must come down hard on an ORV hunter who is skirting the law; a warden investigates a hunter on private property.

Officers encounter many hunters on the opening day of waterfowl season; Chief Haines and his friends enjoy hunting during their annual Grouse Camp trip, and activities heat up on the lake as patrons celebrate the 4th of July.

The Jobbie Nooner event has wardens patrolling the waters of Lake St. Clair; things get interesting when a massive storm rolls in; spring in Michigan can come with major forest fires and the DNR puts all their resources to keep them in check.

The lives of men and women who are making the Michigan wilderness and landscape a safer place for not only animals, but humans alike.

Discovering the lives of conservation officers of Montana defending public lands, handling anti-poaching sting operations and more.

A warden follows the trail to locate a mysterious group of hunters; when a warden draws a coveted mule deer hunting tag, he makes memories to last a lifetime; wardens have to ask some tough questions when a large pile of wasted game birds is found.

Wardens enforce strict paddlefish season rules and manage the high-traffic shed hunting rush; biological data is collected from harvested bears to monitor population health.

Wardens handle a man caught in a lie; a deer investigation reveals a history of game violations; wardens deploy a mission to find the culprit responsible for the decapitation of a trophy bull elk.